How Much for the Stuff in my Basement: Comics and Collectibles

So you’re in the basement one day and you see an unlabelled box sitting quietly in a corner. Curious, you open it and you see stuff that might have been your ex’s, your parents’ or even yours from years ago. Your first instinct is to throw it out. After all, you don’t need it but before you do that, have you thought about selling it and pocketing the cash?